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匿名使用者
匿名使用者 發問時間: 社會與文化語言 · 1 0 年前

logistics curve

6. Ten years ago, at time t-=0, only one percent of households had broadband internet service. Today half the households have broadband. Show how to use logistics curve to predict when the participation rate will reach 90%?

Ans: t=14.67

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我需要計算 謝謝大家囉

2 個解答

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  • 1 0 年前
    最佳解答

    Logistics curve: P(t)= 1 / (1+n*e^(-t/u))

    at t=0, P(t)=0.01 ==> n = 99 ,

    at t=10, P(t)=0.5 ==> u = 2.17622 ,

    find t , where P(t)=0.9 ==> t= 14.78

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  • 1 0 年前

    是要翻譯還是要算?

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